Algebramedium · Past Paper
Factorize a^2 - 10a + 21.
A(a-3)(a-7)
B(a+3)(a+7)
C(a-21)(a-1)
D(a-5)^2
✓ Correct Answer: A — (a-3)(a-7)
Multiply to 21, add to -10: -3 and -7.
Share this question
✓ Correct Answer: A — (a-3)(a-7)
Multiply to 21, add to -10: -3 and -7.
Share this question